package drds.server.sqlparser.sqlobject.expression;

import drds.server.sqlparser.sqlobject.AbstractSqlObject;

/**
 * 
 * @author 曹正辉<330937205@qq.com>
 * 
 */
public abstract class AbstractExpression extends AbstractSqlObject implements Expression {

	public AbstractExpression() {

	}

	public abstract boolean equals(Object o);

	public abstract int hashCode();
}
